Making your own ginger beer using a starter that you maintain (google "ginger bug") is an easy way to get into DIY probiotics. And, the book "The Art of Fermen

Making your own ginger beer using a starter that you maintain (google "ginger bug") is an easy way to get into DIY probiotics. And, the book "The Art of Fermentation", which promotes fermenting beverages, vegetables, etc using wild yeasts and generally yielding foods with various Lactobacillus, is a fantastic read.